In the application, I have an entity class named “Car” and a request class named “AddCarRequest” from which I will get information about that class via user input.

@RequestMapping("/saveAddCarForm")
    public String saveCarForm(@Valid @ModelAttribute("addCarRequest") AddCarRequest addCarRequest , BindingResult bindingResult) {


        if(bindingResult.hasErrors()) {
            return "add-car-form" ;
        }
        else {
            carService.addCar(addCarRequest);
        }

        return "redirect:/" ;
    }

When I validate with valid in my controller like this, it does not validate on the addCarRequest object, it uses the annotations in the car class. After doing some research, I saw that the source of this problem could be that I map my addCarRequest object to a car object in my service method and save my car object to the db. However, I need to do it like this. Have you ever encountered a problem like this? If you want to see extra classes ı can share

I tried lots of thing but ı couldnt solve